YS/T 746.13-2010Methods for chemical analysis of tin-based lead-free solders. Part 13: Determination of nickel content. Flame atomic absorption spectrometric method (English PDF)

Foreword

YS/T 746 "non-Pb-based solder chemical analysis method" is divided into 17 parts.

--- Part 1 Determination of tin content Coke sexual gallic acid Covering - lead nitrate titration method

--- Part 2 of silver content - Flame atomic absorption spectrometry and potentiometric titration with potassium thiocyanate

--- Part 3 of copper content - Flame atomic absorption spectrometry and titration with sodium thiosulfate

--- Part 4 of lead content - Flame Atomic Absorption Spectrometry

--- Part 5 of bismuth content - Flame atomic absorption spectrometry and titration Na2EDTA

--- Part 6 of antimony content - Flame Atomic Absorption Spectrometry

--- Part 7 Determination of iron content by flame atomic absorption spectrometry

--- Part 8 of arsenic content of arsenic, antimony molybdenum blue spectrophotometric method

--- Part 9 Determination of zinc content by flame atomic absorption spectrometry and titration Na2EDTA Part 10 Determination of aluminum content --- first electrothermal atomic absorption spectrometry

--- Part 11 of cadmium content - Flame Atomic Absorption Spectrometry

--- Part 12 Determination of indium titration Na2EDTA

--- Part 13 Determination of nickel content by flame atomic absorption spectrometry

--- Part 14 Determination of the phosphorus content of the first crystal violet - heteropoly acid phosphovanadomolybdate spectrophotometry

--- Part 15 Determination of germanium content salicylfluorone spectrophotometry

--- Part 16 Determination of rare earth Arsenazo III spectrophotometry

--- Part 17 silver, copper, lead, bismuth, antimony, iron, arsenic, zinc, aluminum, cadmium, nickel, indium content was measured by inductively coupled plasma optical emission Spectroscopy this is Part 13.

This section is in accordance with GB/T 1.1-2009 given rules drafted.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This section is drafted. Yunnan Tin Group Co., Ltd.

Participated in the drafting of this section. High-tech Co., Ltd. Shenzhen Grammy, your research Platinum limited liability company.

1 Scope

YS/T 746 This section specifies the determination method based solder lead-free solder in nickel content.

This section applies to the determination of tin-based solder without nickel content. Measurement range. 0.0025% to 1.000%.

2 Method summary

Samples with hydrochloric acid, hydrogen peroxide dissolved with hydrochloric acid - hydrobromide exclude a large number of tin, in 5% nitric acid medium, using air - acetylene flame, Atomic absorption spectrometer at a wavelength of 232.0nm measured absorbance.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.

3.1 hydrochloride (rho1.19g/mL).

Nitrate 3.2 (rho1.42g/mL).

3.3 hydrobromide (rho1.38g/mL).

3.4 Hydrogen peroxide (30%).

HCl 3.5 - hydrobromic acid (11).

3.6 Nickel standard stock solution. Weigh 1.0000g of nickel (>=99.99%), placed in a beaker of 250mL, 50mL of nitric acid was added (11), Dissolved by heating, boiling rid of nitrogen oxides, water transferred to 1000mL volumetric flask, and dilute to volume, and mix. This solution containing 1mL 1mg nickel.

3.7 Nickel standard solution. Pipette 50.00mL Nickel standard stock solution (3.6) in 500mL volumetric flask, was added 25mL of nitric acid (3.2), Diluted with water to volume, and mix. This solution 1mL containing 100µg nickel.

4 Instrument

Atomic absorption spectrometer, with a nickel hollow cathode lamp.

Under optimum working conditions for those who can reach the following indicators can be used.

--- Characteristic concentration. a solution in the measurement matrix consistent solution, characteristic concentration of nickel should be less than 0.042µg/mL.

--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%;

With the lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum 0.5% concentration of the standard average absorbance.

--- Linear curve. A standard curve is divided into five sections according to concentration, absorbance difference of the absorbance difference between the highest and the lowest segment Ratio of not less than 0.70.